uestion 3: Evaluate [F.dr where F =(x² + y²)i – 2xyj and C is a rectangle in xy-plan
bounded by y=O,x=a y=b,x=0
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Curve C1: Parameterise C1 by r(t)=(x(t),y(t) = ( cost, sin t), where 0 ≤ t ≤ π/2 and F = (x2, −xy) and dr = (dx, dy). Hence,. ∫C1F · dr = ∫C1.
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